1. Tables of Radioactive Isotopes;Browne,1978
2. Nucl;Charpak;Instrum. Methods,1968
3. Guide to the Expression of Uncertainty in Measurement (GUM, 1993). International Organization for Standardization, Switzerland, p. 19.
4. Hino, Y., 2003. Present status of APMP-TCRI-WG(II). APMP-TCRI-WG (II) Report, TCRI03-09(II).
5. NCRP-58, A Handbook of Radioactivity Measurements and Procedures. NCRP Publications, Washington, p. 62.